Agreed that some people were awful, but I still think this problem applies.
If somebody says “There’s a 80% chance of rain today, you idiot, and everyone who thinks otherwise deserves to die”, then it’s still not clear that a sunny day has proven them wrong. Or rather, they were always wrong to be a jerk, but a single run of the experiment doesn’t do much to prove they were wronger than we already believed.
You might want to try adapting some of the ones from http://slatestarcodex.com/2018/02/06/predictions-for-2018/ and the lists linked at the bottom.